(Z)-5-[2-(Benzo[b]thio­phen-2-yl)-1-(3,5-di­meth­oxy­phen­yl)ethen­yl]-1H-tetrazole methanol monosolvate, C19H16N4O2S·CH3OH, (I), was prepared by the reaction of (Z)-3-(benzo[b]thio­phen-2-yl)-2-(3,5-di­meth­oxy­phen­yl)acrylo­nitrile with tri­butyl­tin azide via a [3 + 2]cyclo­addition azide condensation reaction. The structurally related compound (Z)-5-[2-(benzo[b]thio­phen-3-yl)-1-(3,4,5-tri­meth­oxy­phen­yl)ethen­yl]-1H-tetra­zole, C20H18N4O3S, (II), was prepared by the reaction of (Z)-3-(benzo[b]thio­phen-3-yl)-2-(3,4,5-tri­meth­oxy­phen­yl)acrylo­nitrile with tri­butyl­tin azide. Crystals of (I) have two mol­ecules in the asymmetric unit (Z′ = 2), whereas crystals of (II) have Z′ = 1. The benzo­thio­phene rings in (I) and (II) are almost planar, with r.m.s deviations from the mean plane of 0.0084 and 0.0037 Å in (I) and 0.0084 Å in (II). The tetra­zole rings of (I) and (II) make dihedral angles with the mean planes of the benzo­thio­phene rings of 88.81 (13) and 88.92 (13)° in (I), and 60.94 (6)° in (II). The di­meth­oxy­phenyl and tri­meth­oxy­phenyl rings make dihedral angles with the benzo­thio­phene rings of 23.91 (8) and 24.99 (8)° in (I) and 84.47 (3)° in (II). In both structures, mol­ecules are linked into hydrogen-bonded chains. In (I), these chains involve both tetra­zole and methanol, and are parallel to the b axis. In (II), mol­ecules are linked into chains parallel to the a axis by N—H⋯N hydrogen bonds between adjacent tetra­zole rings.

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Published in Acta Crystallographica Section E: Crystallographic Communications, v. 72, part 5, p. 652-655.

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

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The authors gratefully acknowledge the Arkansas Research Alliance for financial support, the UAMS sub award to PNR and SA from NIA Claude Pepper Center grant P30-AG028718 (J. Wei, P.I.) and the NIH/National Institute of General Medical Sciences (P20GM109005) for a COBRE award.

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Supporting information: this article has supporting information at journals.iucr.org/d.

CCDC references: 1472235; 1472234

Crystal structure: contains datablocks global, I, II. DOI: 10.1107/S2056989016005600/hg5472sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S2056989016005600/hg5472Isup2.hkl

Structure factors: contains datablock II. DOI: 10.1107/S2056989016005600/hg5472IIsup3.hkl

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3D view of crystallographic information

hg5472-powerpoint slides.pptx (561 kB)
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hg5472sup1.cif (2503 kB)
Crystal structure: contains datablocks global, I, II

hg5472Isup2.hkl (565 kB)
Structure factors: contains datablock I

hg5472IIsup3.hkl (266 kB)
Structure factors: contains datablock II

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